Promoting gambling is not a bad thing to me because I myself is a gambler. I have been playing gambling on a low key for more than 6 years now and I do win and lose but to me what really matters is having control over yourself on when you are gambling.
This is good to hear that you are having control gambling for too long,you can be a good example for how gamblers need to be.When we don't have much greed while betting and also aware of when to stop betting make us to gamble long without any issues.
From this experienced gambler everything can be smooth he can continue working and promoting without any problem, as he already have a long time playing activities so he can be a good example on how things should be done, gambling can be fun and yet addictive for people who don't know how to play properly.
You are free to promote gambling to anyone, regardless of whether they are addicts, profit or loss. that is none of your business.
the most important thing is if you promote gambling, you also have to give them risks and consequences, so he know firts what will he face